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I am an Associate Professor in the College of Computing at
Georgia Tech. My research focuses on the security of mobile
systems, with a concentration on telecommunications infrastructure
and mobile devices. My research has uncovered critical
vulnerabilities in cellular networks, made the first
characterization of mobile malware in provider networks and offers
a robust approach to detecting and combatting Caller-ID scams. I am
also interested in Internet security and the systems challenges of
applied cryptography. I received a CAREER Award from the National
Science Foundation in 2010 and was named a Sloan Fellow in 2014.
Click to learn more information about my
research,
publications and
citations.

I earned my Ph.D and M.S. in Computer Science and Engineering from
the Pennsylvania State University in 2008 and 2004, respectively,
and my B.S. in Computer Science from the University of Richmond in
2002. I am currently a member of the
Georgia Tech Information
Security Center (GTISC) and a co-director of the Converging
Infrastructure Security Laboratory (CISEC). I am also a co-founder
of Pindrop Security.

Note: I am always looking for
strong students with an interest in network security. Students
must have a strong technical background, be comfortable with
systems work and be prepared to work hard. If you are not a student
at Georgia Tech and are interested in my research, please
apply to the
program.

March 12, 2014: I have officially been granted tenure and
promotion at Georgia Tech, and am now an Associate Professor of
Computer Science. Great thanks to my students, colleagues, and
most importantly my family and friends for their support over the
last six years.

February 18, 2014: I have been named a
2014 Sloan Fellow. The Sloan Fellowship is one of the top honors bestowed upon young
faculty across all of science and engineering. I am grateful to the Alfred P. Sloan Foundation
for this tremendous honor.

January 27, 2014: An extended version of our paper, "Accountable Wiretapping -or-
I Know They Can Hear You Now", has been accepted for publication in the Journal of
Computer Security (JCS). This work, which provides the first secure auditing methods for
legal wiretapping and helps prevent abuses of such systems, is the result of the partnership
between four universities and experts in the fields of cellular networks, telephony,
systems and cryptography.

December 3, 2013: Congratulations to my Ph.D. student,
Chaitrali Amrutkar, who successfully
defended her dissertation entitled "Towards Secure Web Browsing on Mobile Devices".
Her work discovered a number of vulnerabilities in mobile browsers, problems with
security indicators and new techniques to detect malicious mobile web pages. She
will join Oracle in the spring.